/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkPlotPie.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

/**
 * @class   vtkPlotPie
 * @brief   Class for drawing a Pie diagram.
 *
 *
 */

#ifndef vtkPlotPie_h
#define vtkPlotPie_h

#include "vtkChartsCoreModule.h" // For export macro
#include "vtkPlot.h"
#include "vtkSmartPointer.h" // To hold ColorSeries etc.

class vtkContext2D;
class vtkColorSeries;
class vtkPoints2D;

class vtkPlotPiePrivate;

class VTKCHARTSCORE_EXPORT vtkPlotPie : public vtkPlot
{
public:
  vtkTypeMacro(vtkPlotPie, vtkPlot);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkPlotPie* New();

  /**
   * Paint event for the item.
   */
  bool Paint(vtkContext2D* painter) override;

  /**
   * Paint legend event for the XY plot, called whenever the legend needs the
   * plot items symbol/mark/line drawn. A rect is supplied with the lower left
   * corner of the rect (elements 0 and 1) and with width x height (elements 2
   * and 3). The plot can choose how to fill the space supplied.
   */
  bool PaintLegend(vtkContext2D* painter, const vtkRectf& rect, int legendIndex) override;

  /**
   * Set the dimensions of the pie, arguments 1 and 2 are the x and y coordinate
   * of the bottom corner. Arguments 3 and 4 are the width and height.
   */
  void SetDimensions(int arg1, int arg2, int arg3, int arg4);

  /**
   * Set the dimensions of the pie, elements 0 and 1 are the x and y coordinate
   * of the bottom corner. Elements 2 and 3 are the width and height.
   */
  void SetDimensions(const int arg[4]);

  ///@{
  /**
   * Get the dimensions of the pie, elements 0 and 1 are the x and y coordinate
   * of the bottom corner. Elements 2 and 3 are the width and height.
   */
  vtkGetVector4Macro(Dimensions, int);
  ///@}

  /**
   * Set the color series to use for the Pie.
   */
  void SetColorSeries(vtkColorSeries* colorSeries);

  /**
   * Get the color series used.
   */
  vtkColorSeries* GetColorSeries();

  /**
   * Function to query a plot for the nearest point to the specified coordinate.
   * Returns the index of the data series with which the point is associated or
   * -1.
   */
  vtkIdType GetNearestPoint(const vtkVector2f& point, const vtkVector2f& tolerance,
    vtkVector2f* location, vtkIdType* segmentId) override;
  using vtkPlot::GetNearestPoint;

  /**
   * Update the internal cache. Returns true if cache was successfully updated. Default does
   * nothing.
   * This method is called by Update() when either the plot's data has changed or
   * CacheRequiresUpdate() returns true. It is not necessary to call this method explicitly.
   */
  bool UpdateCache() override;

protected:
  vtkPlotPie();
  ~vtkPlotPie() override;

  int Dimensions[4];

  /**
   * The color series to use for the pie.
   */
  vtkSmartPointer<vtkColorSeries> ColorSeries;

  /**
   * Store a well packed set of angles for the wedges of the pie.
   */
  vtkPoints2D* Points;

private:
  vtkPlotPie(const vtkPlotPie&) = delete;
  void operator=(const vtkPlotPie&) = delete;

  vtkPlotPiePrivate* Private;
};

#endif // vtkPlotPie_h